Question

Question:-

The correct order of electron affinity is _________.

Options:-

a) F > C> Br→ I
b) CI→ F→ Br > I
c) Br > | > CI→F
d) I → F → Cl → Br.​

Answer 1

Answer:

Generally, the electron affinity values of 3 rd

 period elements are higher than the elements of the 2nd period of the same group because of less interelectronic repulsions. Atomic size, nuclear charge, and electrons configurations also affect the electron affinity.

Electron gain enthalpies in kJmol  

−1

 are: C=−121,Si=−134;P=−74;N≈O,O=−142,F=−328